000
AXPZ20 KNHC 160337
TWDEP 

TROPICAL WEATHER DISCUSSION
NWS TPC/NATIONAL HURRICANE CENTER MIAMI FL
0405 UTC MON NOV 16 2009

TROPICAL WEATHER DISCUSSION FOR THE EASTERN PACIFIC OCEAN FROM 
THE EQUATOR TO 32N...EAST OF 140W. 

BASED ON 0000 UTC SURFACE ANALYSIS AND SATELLITE IMAGERY THROUGH 
0300 UTC.

...ITCZ...
AXIS ALONG 07N78W TO 08N119W TO 07N130W TO 06N140W.  SCATTERED 
MODERATE CONVECTION WITHIN 270 NM N OF AXIS W OF 123W.

...DISCUSSION...
UPPER LEVEL TROUGH EXTENDING FROM 32N109W THROUGH TO 26N125W 
LIFT NE AS WELL ANCHORED RIDGE HOLDS ON TO EASTERN SIDE OF 
BASIN.  80-85 KT JET CORE STILL REMAIN BRINGING CONVECTIVE 
DEBRIS FROM ITCZ NE INTO MEXICO AND CONUS CENTRAL PLAINS.  
CONFLUENT FLOW NW OF TROUGH AXIS MAINTAINS VERY DRY AIR MASS N 
OF 20N FROM 110W-135W.  

MID TO UPPER LEVEL RIDGE UPSTREAM OF TROUGH BRINGS GOOD SUPPORT 
TO SURFACE HIGH PRES 1027 MB AT 35N133W CONTINUING FRESH TO 
STRONG BREEZE ALONG TRADEWIND BELT W OF 117W...WHICH SHRINKS IN 
COVERAGE AND STRENGTH AS HIGH PRES CENTER DRIFT E FORCED BY COLD 
FRONT MOVING INTO NW CORNER OF E PAC.

HIGH PRES MOVES INLAND FORCING STRONG NW WINDS INTO GULF OF 
CALIFORNIA SPREADING DOWN S ALONG GULF.  EVENT IS SHORT LIVED AS 
HIGH PRES MOVES QUICKLY E AND RELAXES GRADIENT.  

$$
WALLY BARNES